CVE-2026-73845

## Summary The `ckan_get_mqa_quality` and `ckan_get_mqa_quality_details` tools restrict their `server_url` argument to `dati.gov.it` via a regular expression. The regex is anchored only at the start and places no boundary after the host, so any URL whose host merely **begins with** `dati.gov.it` — or that uses `dati.gov.it` as URL *userinfo* before an `@` — passes validation while actually targeting an attacker-controlled host. ## Affected code ```js // src/tools/quality.ts const ALLOWED_SERVER_PATTERNS = [ /^https?:\/\/(www\.)?dati\.gov\.it/i // <-- no end anchor / host boundary ]; export function isValidMqaServer(serverUrl: string): boolean { return ALLOWED_SERVER_PATTERNS.some(pattern => pattern.test(serverUrl)); } ``` All of the following return `true`: | URL | Real host | |-----|-----------| | `https://dati.gov.it.attacker.com/x` | `dati.gov.it.attacker.com` (attacker) | | `http://dati.gov.it.evil.example/api` | `dati.gov.it.evil.example` (attacker) | | `https://[email protected]/x` | `attacker.com` (userinfo trick) | After passing this check, `server_url` flows into `getMqaQuality`/`getMqaQualityDetails`, which call `makeCkanRequest(serverUrl, "package_show", { id })`. The server therefore issues a request to the attacker-controlled host and returns its (parsed) response to the caller. ## Impact - The intended "dati.gov.it only" trust boundary for the MQA tools is defeated; they can be driven against arbitrary external hosts. - The attacker host receives the request (including the `dataset_id`) and controls the response body that is surfaced back to the model/user — enabling response spoofing and, in an agentic setting, indirect prompt-injection content delivered under the guise of a trusted-portal tool. - Contributes to SSRF surface: while `makeCkanRequest` blocks private/internal IPs, this bypass removes the domain restriction that the code intends to enforce for these tools. The `@`-userinfo variant is the most severe form because